如何在Objective-c中获取下周的开始和结束日期？

// 获取当前日期
NSDate *currentDate = [NSDate date];

// 创建一个NSCalendar对象
NSCalendar *calendar = [NSCalendar currentCalendar];

// 获取下周的日期
NSDateComponents *nextWeekComponents = [[NSDateComponents alloc] init];
nextWeekComponents.weekOfYear = 1;
NSDate *nextWeekDate = [calendar dateByAddingComponents:nextWeekComponents toDate:currentDate options:0];

// 获取下周的开始日期
NSDateComponents *nextWeekStartComponents = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday fromDate:nextWeekDate];
nextWeekStartComponents.weekday = calendar.firstWeekday;
NSDate *nextWeekStartDate = [calendar dateFromComponents:nextWeekStartComponents];

// 获取下周的结束日期
NSDateComponents *nextWeekEndComponents = [calendar components:NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday fromDate:nextWeekDate];
nextWeekEndComponents.weekday = calendar.firstWeekday + 6;
NSDate *nextWeekEndDate = [calendar dateFromComponents:nextWeekEndComponents];

// 格式化日期
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];

// 输出结果
NSString *nextWeekStartDateString = [dateFormatter stringFromDate:nextWeekStartDate];
NSString *nextWeekEndDateString = [dateFormatter stringFromDate:nextWeekEndDate];

NSLog(@"下周的开始日期：%@", nextWeekStartDateString);
NSLog(@"下周的结束日期：%@", nextWeekEndDateString);